Substituent modification to prevent Dexter energy transfer for stable hyperfluorescent organic light-emitting diodes

Chanhee Lee; Youichi Tsuchiya; Sae Youn Lee; Chihaya Adachi

doi:10.1093/chemle/upaf240

Substituent modification to prevent Dexter energy transfer for stable hyperfluorescent organic light-emitting diodes

Chanhee Lee
, Youichi Tsuchiya
, Sae Youn Lee
, Chihaya Adachi

Department of Energy and Materials Engineering

Kyushu University

Research output: Contribution to journal › Article › peer-review

Abstract

Hyperfluorescent (HF) organic light-emitting diodes (OLEDs) utilizing multi-resonance (MR) type thermally activated delayed fluorescence (TADF) emitters as terminal emitters (TEs) have attracted attention for their stable, efficient device performance. Nevertheless, research to improve device lifetime remains essential, with a focus on suppressing Dexter energy transfer (DXET). In this study, we developed a bulkier TE to increase the distance between the assistant dopant (Ad) and the TE within the HF system, thereby suppressing DXET. As a result, we successfully extended the device lifetime while maintaining the EQE.

Original language	English
Article number	upaf240
Journal	Chemistry Letters
Volume	55
Issue number	1
DOIs	https://doi.org/10.1093/chemle/upaf240
State	Published - 1 Jan 2026

Keywords

device stability
Dexter energy transfer
hyperfluorescence

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10.1093/chemle/upaf240

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title = "Substituent modification to prevent Dexter energy transfer for stable hyperfluorescent organic light-emitting diodes",

abstract = "Hyperfluorescent (HF) organic light-emitting diodes (OLEDs) utilizing multi-resonance (MR) type thermally activated delayed fluorescence (TADF) emitters as terminal emitters (TEs) have attracted attention for their stable, efficient device performance. Nevertheless, research to improve device lifetime remains essential, with a focus on suppressing Dexter energy transfer (DXET). In this study, we developed a bulkier TE to increase the distance between the assistant dopant (Ad) and the TE within the HF system, thereby suppressing DXET. As a result, we successfully extended the device lifetime while maintaining the EQE.",

keywords = "device stability, Dexter energy transfer, hyperfluorescence",

author = "Chanhee Lee and Youichi Tsuchiya and Lee, \{Sae Youn\} and Chihaya Adachi",

year = "2026",

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doi = "10.1093/chemle/upaf240",

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journal = "Chemistry Letters",

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T1 - Substituent modification to prevent Dexter energy transfer for stable hyperfluorescent organic light-emitting diodes

AU - Lee, Chanhee

AU - Tsuchiya, Youichi

AU - Lee, Sae Youn

AU - Adachi, Chihaya

PY - 2026/1/1

Y1 - 2026/1/1

N2 - Hyperfluorescent (HF) organic light-emitting diodes (OLEDs) utilizing multi-resonance (MR) type thermally activated delayed fluorescence (TADF) emitters as terminal emitters (TEs) have attracted attention for their stable, efficient device performance. Nevertheless, research to improve device lifetime remains essential, with a focus on suppressing Dexter energy transfer (DXET). In this study, we developed a bulkier TE to increase the distance between the assistant dopant (Ad) and the TE within the HF system, thereby suppressing DXET. As a result, we successfully extended the device lifetime while maintaining the EQE.

AB - Hyperfluorescent (HF) organic light-emitting diodes (OLEDs) utilizing multi-resonance (MR) type thermally activated delayed fluorescence (TADF) emitters as terminal emitters (TEs) have attracted attention for their stable, efficient device performance. Nevertheless, research to improve device lifetime remains essential, with a focus on suppressing Dexter energy transfer (DXET). In this study, we developed a bulkier TE to increase the distance between the assistant dopant (Ad) and the TE within the HF system, thereby suppressing DXET. As a result, we successfully extended the device lifetime while maintaining the EQE.

KW - device stability

KW - Dexter energy transfer

KW - hyperfluorescence

UR - https://www.scopus.com/pages/publications/105027970886

U2 - 10.1093/chemle/upaf240

DO - 10.1093/chemle/upaf240

M3 - Article

AN - SCOPUS:105027970886

SN - 0366-7022

VL - 55

JO - Chemistry Letters

JF - Chemistry Letters

IS - 1

M1 - upaf240

ER -

Substituent modification to prevent Dexter energy transfer for stable hyperfluorescent organic light-emitting diodes

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Keywords

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